Definition of Needle telegraph. Meaning of Needle telegraph. Synonyms of Needle telegraph

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Definition of Needle telegraph

Needle telegraph
Needle Nee"dle, n. [OE. nedle, AS. n?dl; akin to D. neald, OS. n[=a]dla, G. nadel, OHG. n[=a]dal, n[=a]dala, Icel. n[=a]l, Sw. n[*a]l, Dan. naal, and also to G. n["a]hen to sew, OHG. n[=a]jan, L. nere to spin, Gr. ?, and perh. to E. snare: cf. Gael. & Ir. snathad needle, Gael. snath thread, G. schnur string, cord.] 1. A small instrument of steel, sharply pointed at one end, with an eye to receive a thread, -- used in sewing. --Chaucer. Note: In some needles(as for sewing machines) the eye is at the pointed end, but in ordinary needles it is at the blunt end. 2. See Magnetic needle, under Magnetic. 3. A slender rod or wire used in knitting; a knitting needle; also, a hooked instrument which carries the thread or twine, and by means of which knots or loops are formed in the process of netting, knitting, or crocheting. 4. (Bot.) One of the needle-shaped secondary leaves of pine trees. See Pinus. 5. Any slender, pointed object, like a needle, as a pointed crystal, a sharp pinnacle of rock, an obelisk, etc. Dipping needle. See under Dipping. Needle bar, the reciprocating bar to which the needle of a sewing machine is attached. Needle beam (Arch.), to shoring, the horizontal cross timber which goes through the wall or a pier, and upon which the weight of the wall rests, when a building is shored up to allow of alterations in the lower part. Needle furze (Bot.), a prickly leguminous plant of Western Europe; the petty whin (Genista Anglica). Needle gun, a firearm loaded at the breech with a cartridge carrying its own fulminate, which is exploded by driving a slender needle, or pin, into it. Needle loom (Weaving), a loom in which the weft thread is carried through the shed by a long eye-pointed needle instead of by a shuttle. Needle ore (Min.), acicular bismuth; a sulphide of bismuth, lead, and copper occuring in acicular crystals; -- called also aikinite. Needle shell (Zo["o]l.), a sea urchin. Needle spar (Min.), aragonite. Needle telegraph, a telegraph in which the signals are given by the deflections of a magnetic needle to the right or to the left of a certain position. Sea needle (Zo["o]l.), the garfish.

Meaning of Needle telegraph from wikipedia

- A needle telegraph is an electrical telegraph that uses indicating needles moved electromagnetically as its means of displaying messages. It is one of...
- a form of needle telegraph, and the first telegraph system to be put into commercial service. The receiver consisted of a number of needles that could...
- consists of needle telegraphs in which a needle pointer is made to move electromagnetically with an electric current sent down the telegraph line. Early...
- American Morse. In France, the telegraph used the Foy-Breguet telegraph, a two-needle telegraph that displa**** the needles in Chappe code, the same code...
- and Wheatstone telegraph, in a series of improvements, also ended up with a one-wire system, but still using their own code and needle displays. The electric...
- The Schilling telegraph is a needle telegraph invented by Pavel Schilling in the nineteenth century. It consists of a bank of needle instruments (six as...
- electrochemical telegraph. Schilling developed the first electromagnetic telegraph that was of practical use. Schilling's design was a needle telegraph using magnetised...
- inventions, including the five-needle telegraph of Wheatstone, and an alarm worked by a relay, in which the current, by dipping a needle into mercury, completed...
- Some early telegraph systems, such as Schilling's 1832 experimental needle telegraph and the 1837 Cooke & Wheatstone five-needle telegraph used by British...
- electromagnet in the receiving instrument. Many of the earliest telegraph systems used a single-needle system which gave a very simple and robust instrument. However...